A diffusive layer including a laminate of a plurality of transparent films is provided. At least one of the plurality of transparent films includes a plurality of diffusive elements with a concentration that is less than a percolation threshold. The plurality of diffusive elements are optical elements that diffuse light that is impinging on such element. The plurality of diffusive elements can be diffusively reflective, diffusively transmitting or combination of both. The plurality of diffusive elements can include fibers, grains, domains, and/or the like. The at least one film can also include a powder material for improving the diffusive emission of radiation and a plurality of particles that are fluorescent when exposed to radiation.

Light reflecting and directing umbrella apparatus and systems and methods utilizing such apparatus capable of shifting its shape for the purpose of manipulating and directing light from a light source in both a symmetrical and asymmetrical manner to illuminate a particular subject in a various manners for stage, studio, motion picture and still photography.

An optical film comprises a first transparent film substrate, a matte layer arranged on the first transparent film substrate and having irregularities, the matte layer having a coefficient of static friction of not larger than 0.3 and a maximum height roughness Rz of not less than 0.05 μm to not larger than 8 μm.

An anti-reflection structure having multiple bottomed tubular light absorption units that each have a bottom part having a substantially circular outer edge part and a wall part that is arranged upright along the outer edge part, an opening being formed above the bottom part, the anti-reflection structure satisfying specific conditions.

A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

A polarizing plate and a liquid crystal display including the same are provided. A polarizing plate includes a polarizing film and a contrast-improving optical film sequentially stacked in the stated order. The contrast-improving optical film includes a contrast-improving layer including a first resin layer and a second resin layer facing the first resin layer. The second resin layer includes a patterned portion having optical patterns and a flat section between the optical patterns. The second resin layer satisfies Equation 1, and the polarizing plate has a contrast ratio gain of about 1.00 or more, as represented by Equation 2.

The present invention provides a diffuser plate and a method for producing a diffuser plate that can improve variations in luminance of transmitted light or reflected light in a simple structure and that enable easy design and production. The diffuser plate according to the present invention is a diffuser plate where a plurality of microlenses are placed on a principal surface, wherein a phase difference generation part is inserted between the plurality of microlenses and the principal surface, the plurality of microlenses have two or more types of lens shapes, and the number of microlenses having the two or more types of lens shapes is determined so that a quantity ratio of the two or more types of lens shapes is a specific value, each of the lens shape types is selected corresponding to each of coordinates on the principal surface in which centers of undersurfaces of the plurality of microlenses are placed, and an angle range in which the diffuse light intensity is substantially uniform is in a range of +10% to −10% of a desired angle range.

An optical film comprises a first transparent film substrate, a matte layer arranged on the first transparent film substrate and having irregularities, the matte layer having a coefficient of static friction of not larger than 0.3 and a maximum height roughness Rz of not less than 0.05 μm to not larger than 8 μm.

An LED display device includes an LED display panel (1); and an encasing, arranged on one side of the LED display panel (1). The encasing includes a plurality of diffuser units (10); each diffuser unit (10) is adhered to the LED display panel (1); and, a locating structure is arranged between the diffuser unit (10) and the LED display panel (1) so as to limit an adhesion position of the diffuser unit (10) on the LED display panel (1). The LED display device has a small splicing gap and a better display effect.

A light homogenizing element includes a light incident surface and at least one diffusion surface, including: a first substrate, a carrier layer, a piezoelectric film, a driving electrode, a light-transmitting layer, and multiple light diffusion microstructures. The first substrate includes a first surface and a second surface opposite to each other. The carrier layer is located on the first surface of the first substrate and includes a light passing region penetrating the carrier layer, and includes a protruding structure enclosing the light passing region. The light-transmitting layer is provided overlapping on the protruding structure, and the surface of the light-transmitting layer covering the light passing region is the light incident surface. The multiple light diffusion microstructures are provided on the at least one diffusion surface, and projections of the multiple light diffusion microstructures on the light-transmitting layer are located in the light passing region.